return empty when I enter “”instrhwinfo('Bluetooth','Hphone')“”

Question

HDying 2014-2-8

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/115325-return-empty-when-i-enter-instrhwinfo-bluetooth-hphone

回答： Vinod 2015-11-23

>> a = instrhwinfo('Bluetooth')

a =

        RemoteNames: {'Hphone'}
          RemoteIDs: {'btspp://087A4C001CFC'}
    BluecoveVersion: 'BlueCove-2.1.1-SNAPSHOT'
     JarFileVersion: 'Version 3.2'

>> instrhwinfo('Bluetooth','Hphone')

ans =

               RemoteName: []
                 RemoteID: []
    ObjectConstructorName: []
                 Channels: []

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Answer 1

HDying 2014-2-8

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https://ww2.mathworks.cn/matlabcentral/answers/115325-return-empty-when-i-enter-instrhwinfo-bluetooth-hphone#answer_123667

编辑：HDying 2014-2-8

thx everybody, I think I find the reason. that is the device is cellphone. the key is it can't run the SPP profile. Look this for details. : http://www.mathworks.com/matlabcentral/answers/98837

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Answer 2

Vinod 2015-11-23

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/115325-return-empty-when-i-enter-instrhwinfo-bluetooth-hphone#answer_200918

In this case this was because the phone did not support Bluetooth Serial Port Profile.

Note that this may also have to do with the device going into a power save mode and not being discoverable. If you are sure the device supports Bluetooth SPP, try power cycling your device and then executing

>>instrhwinfo('bluetooth','_myDevice_')

Note that the information returned is frequently usable even if the device is in power save mode, so you only potentially need this information once.